Question

Susan's penny bank is 1/10 full. After she adds 240 pennies, it is 2/5 full. How many pennies can Susan's bank hold?

Answer 1

240 pennies occupy (2/5 minus 1/10) the penny bank volume.

2/5 - 1/10 = 3/10 = .3

240 pennies .3 * the volume

Volume = 240 / .3 = 800 pennies

Explanation: